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Last modified
1/26/2010 2:20:04 PM
Creation date
10/12/2006 1:18:08 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8111.805
Description
Arkansas River Compact Administration - Keesee Ditch
Basin
Arkansas
Date
1/1/1986
Author
HRS Engineering
Title
Keesee Ditch Change of Water Rights Vol 3 - Potential for Upstream Exchange of Kessee Ditch Water Stored in John Martin Reservoir
Water Supply Pro - Doc Type
Publication
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />LOSSES INCURRED DURING STORAGE <br /> <br />Pending an opportunity for upstream exchange, the Keesee Account (as <br />described in "Keesee Ditch Change of Water Rights - Volume 2 - Proposed Plan <br />of Operation for Storage in John Martin Reservoir") may incur losses which reduce <br />the volume of water to be exchanged upstream. There are two types of losses <br />which will be charged against the Keesee account. These are Evaporation Losses <br />and Transit Losses. <br /> <br />Evaporation Losses <br /> <br />Evaporation losses from John Martin Reservoir are calculated every day <br />and charged against each account in the reservoir, in proportion to the amount <br />of water stored in each account. Naturally, it will be most efficient to exchange <br />Kessee water upstream as soon as possible so that evaporation losses can be <br />minimized. <br /> <br />If, however, an exchange opportunity is not available or if water is detained <br /> <br /> <br />in the reservoir for some other reason, the Keesee account will be reduced due <br /> <br />to these evaporation charges. In order to estimate the potential volume of <br /> <br /> <br />evaporative losses, records of John Martin Reservoir storage accounts were <br /> <br /> <br />examined. <br /> <br />The Permanent Recreation Pool was selected as a representative account <br />because it is maintained at a consistent volume of storage. Monthly records <br />of storage contents and evaporation charges were examined for the period 1982 <br />through 1985, and average evaporation losses expressed as a percentage of storage <br />contents were calculated. Table 12 lists the monthly average percentage <br />evaporation loss calculated for the Permanent Recreation Pool. Using the average <br />annual evaporation loss of 22.6%, and assuming the Keesee account were to remain <br />in storage for an entire year, the average annual transferable amount would <br />be reduced from 2,925 acre-feet to 2,264 acre-feet. If the Keesee account is <br />filled in April, for example, and fully exchanged in June, losses would only be <br />about 185 acre-feet, or 6.3%. <br /> <br />-9- <br />
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